FAST SCAN BACKWARD WAVE OSCILLATOR SPECTROMETER.
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Publisher:Ohio State University
The development of a simple fast scan millimeter and submillimeter wave spectrometer based on a free running Backward Wave Oscillator (BWO), fast sensitive InSb liquid helium temperature detectors, and a 40 meter long Fabry-Perot (FP) cavity will be presented. In addition to serving as frequency calibration markers, the FP cavity modes also probe the frequency/voltage characteristics of the BWO and the overall characteristics of the system. Nitric acid has served both as a calibrant gas and a sample gas. Typical results from this spectrometer include 100 GHz of spectral data acquired in 5 seconds with the frequency measurement accuracy 50 kHz. The limitations, advantages, and ultimate sensitively of this spectrometer will be addressed.
Author Institution: Department of Physics, The Ohio State State University
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